It is a unique 4 port USB (Universal Serial Bus) 2.0 the size of a credit card just 12mm in height, high speed data transfer 40 times faster than traditional USB (Universal Serial Bus) 1.1 when connect to a USB (Universal Serial Bus) device. The Mini Hub Slim 2.0 is backward compatible with USB (Universal Serial Bus) 1.1 peripherals so all your existing USB (Universal Serial Bus) products will work perfectly with this hub but will give you the flexibility to upgrade to USB (Universal Serial Bus) 2.0 peripherals.